Improved apparatus for making- extracts and essences



*5. E. BURROUGH.

Making Extracts.

No. 83,922. Patented Nov. 10, 1868.

To all whom t't'may concern:

amitbl fiistea int-est can. a

v EDWARD E. BURROUGH, OF BALTIMORE, MARYLAND.

Letters Patent No. 83,922, dated November 10, 1868. L

The Schedule referred to in these Letters Patent and making part of the B Be it known that I, EDWARD E. Burrnouen, of the city and county oi Baltimore, and State of Maryland, have invented a new and improved Water-Bath Apparatus for Manufacturing Medical Extracts; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being bad to the accompanying drawings, making apart of this specification, in which my invention isrepresented by a side view, a part being shown in section.

This invention has for its object the construction of a simple, cheap, and convenient apparatus with which, by the application of hot water to the walls and bot tom of the vessel that contains the materials to be treated, essences, medical extracts, 8m, may be rapidly, conveniently, and tl'ioroughly extracted from either liquid or solid substances.

To this end, the invention consists in the employment of a stove, coiled water-pipe, reservoir, heater,

retort, and condenser, provided with suitable supply and exhaust-cocks, and arranged in a convenient mannor, as shown by the drawing, and as I will now more particularly describe.

In the drawings A represents the stove.

' B, a vessel filled with water.

0, a retort, fitting into the top of the vessel B.

D, a condenser, above and'around the retort.

E, a water-pipe, extending from the bottom of vessel B-to the stove, in the fire-chamber of which it is coiled, as seen'in the drawing, and thence extending back to the vessel B, but entering the latter near its top, so that as the water of. the pipe is heated by the stove, a continuous current from the vessel B to the stove, through the lower branch of the pipe, and fi'om the stove back to the vessel, through the upper pipe, is established, and maintained during the whole process.

F is a reservoir, containing water, which, by means of a pipe, f, connected with the lower branch of pipe E, supplies water constantly to the apparatus.

This tank or reservoir is situated above the level of the top of vessel B, so that the latter will be kept full of water, and the pipe j, which connects it to pipe E, bends down under the latter before forming the connectron, as seen at f. The top of vessel F maybe open.

By this means, a constant supply is maintained, and a sufficiently rapid circulation is kept up to insure the quick heating of the retort, ivhile an escape-valve (the reservoir F) is provided for the relief of the steampressure, whentoo great, both by the escape of the steam into the open air, and by its condensation in the cold water flowing from the reservoir.

It will be observed that as the water is heated in the stove, it is force/directly against the bottom of I the retort, whereby the greatest cifect is exerted upon the latter.

The branches of pipe E may be connected and mutually braced by rods, H H, if preferred, and any arrangement of convolutions, coils, or other apparatus for increasing the heating-surface within the stove A may be employed.

The form which I prefer for the vessel B is that of a hemisphere, as shown in the drawing, and this may be surrounded by a jacket or outer shell, G, of any form, for the purpose of protection against the cool atmosphere, and to insure .the most complete utilization of the heat. In this case the vessel B may, by means of a flange, 1), around its rim, be supported by the casing G, shown in the drawing.

The retort C is formed by means of a concave plate, I, supported by the vessel B in the same manner that the latter is supported-by the casing G, viz, by a flange, 1', around its rim, resting upon the flange l). The upper part of the retort is attached to the condcnser'D, forming the bottom of the latter.

'In constructing it, the condenser is provided with a bottom, (I, convex on its upper and concave on its lower side, with a horizontal outer flange, c, by which it is supported, this flange resting on flange t, with an inward-inclined flange, c, projecting downward around its under edge, and fitting tightly into the upper part of the concave plate I; and with an inward-inclined flange, e, projecting upward from the lower edge of the concave bottom at. The bottom, d, may also be provided with a gate, or man-hole, 6!, closed by a screwplug, or other suitable stopple.

A faucet, J, serves to draw ofi the cold water from the condenser, when required, and when volatile extracts are being made, another, K, passing through the condenser into the annular space between the flange e and bottom, d, serves to withdraw such extracts or essence from the retort.

When preparing liquid extracts, medicines, &c., another faucet, L, extending trom the bottom, I, of the retort down through the water-vessel B, serves to draw off the extract,while the volatile alcoholic vapors are condensed into the space between flange e and bottom,

(l, and drawn off by means of faucet K, as aforesaid.

m is a waste-pipe, which prevents the condenser from overflowing, when a constant stream of cold water is discharged into it by a supply-pipe, not shown in the drawings. By means of such pipe andwaste-hole, the water in the condenser can be discharged, and renewed as fast as it becomes warmed, by the retort below. A I This completes the construction of my apparatus. It only remains to describe its operation, which can be done very briefly.

The condenser, including the parts 1), 11,0, 0, and a, being removed, the materials to be used in the process are placed in the concave vessel I. The apparatus that has been removed is replaced, the reservoir and condenser filled with water, and a fire made in the stove. The circulation of water, above described, will at once begin, andyas the mass in vessel I heated, the essential oils and other volatile parts will' pass off, he condensed to liquids by contact with the cold concave surface- (I, and run down into the space between the concave and the flange'e, whence they may be withdrawn by cock K.

The removal of the condenser, preparatory to filling the retortvbefore beginning the process, is of course no essential part of the process, as, by means of the orifice d, the retort might be filled without removing the tom (1, plug' d, flanges c c e, and cooks J K, all arranged to operate in the manner and for the purpose set forth.

2. The arrangement of said vessei with the vessels I and B, substantially, as described,

3. The arrangement of said vessels D I B with the casing Gr, substantially as desribed.

4, The arrangement of. the vessels D I B with the pipe E, substantially described.

5. The arrangement of said vessels D I B and pipe E with the reservoir F and pipe f, substantially as described.

6. The arrangement of stove A, pipe E, vessels F G B I D, cocks J K L, plug d, and flanges 0' 0, substantially as described, and for the purposes specified.

E. E. BURROUGH.

Witnesses;

O. A. PETTIT, A. M. TANNEi t. 

